JPH11239182A - Wireless internet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of smooth communication without interference by performing composition from the radio router for performing spread spectrum communication and a server computer, connecting the routers by radio communication and connecting the server computer and a terminal computer by a cable or the like without using a public line. SOLUTION: The routers connected by a private line are connected by radio communication instead of the private line and the user of this internet owns the radio router 1 and the server computer 2 as needed. Since a radio frequency is a public resource, it is required to perform a lot of communication in the range of the limited frequency. Thus, in order to effectively use the limited frequency by many users, the spread spectrum communication is performed. By connecting the routers by radio the need of private line connection between the routers and line connection between the server computer and the terminal computer of the user is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless (wireless communication) Internet.

[0002]

2. Description of the Related Art Conventionally, between Internet routers,
They were connected by leased lines, and the router and server computers were managed by the service provider. Also, the server computer and the user's terminal computer were connected by a public line.

[0003]

[Problems to be solved by the invention] When using the Internet, it was necessary to contract with a connection company that connects to the Internet with a dedicated line, and pay the contract fee and connection fee. In addition, you had to pay the telephone company for the line usage to the provider's access point. Also, when connecting between routers by wireless communication, conventional methods use a limited number of frequencies, so interference occurred and communication could not be performed smoothly.

[0004]

As shown in FIG. 1, the present invention comprises a wireless router 1 for performing spread spectrum communication and a server computer 2, and the connection between the routers is established by wireless communication. It is something to be done. In addition, since the wireless router and the server computer are managed by the Internet user, the server computer and the terminal computer are connected by a cable or the like without using a public line.

[0005]

The router connected by the dedicated line is connected by wireless communication instead of the dedicated line, and the user of the Internet owns the wireless router 1 and the server computer 2 as required. Since the radio frequency is a public resource, it is necessary to perform many communications within a limited frequency range. However, in the case of a normal communication system, since the frequency is divided and assigned to the user,
When the number of users increases, smooth communication cannot be performed. Therefore, spread spectrum communication is performed so that many users can effectively use the limited frequency.

As shown in FIG. 2, in the spread spectrum communication, the transmission side performs gorge band modulation 4 performed in normal communication, and then performs spread modulation 5. On the receiving side, despreading 7 is performed first, and then demodulation 8 performed in normal communication is performed.
As a result, the transmission side spreads the transmission signal over a wide band at a low power density and transmits the signal. On the receiving side, as shown in FIG. 3, the target wave 10 spread together with the interference wave 9 is received,
Perform despreading. Then, the spread target wave becomes the target wave 11 restored to the gorge band at a high power density. But,
The interference wave is spread by despreading and spreads over a wide band at a low power density. Therefore, by passing through a gorge bandpass filter adapted to the bandwidth of the target wave, most of the spread interference wave 12 can be removed, and the target wave can be obtained.

Here, the spreading on the transmitting side and the despreading on the receiving side can perform communication by using the same code 6, and cannot perform communication with different codes. Therefore,
Even at the same frequency, if the code is different, many sets can simultaneously communicate with different contents.

If the same code is used by a large number of stations, interference occurs. Therefore, the code is arbitrarily created and is recognized only by one station of the connection partner. At this time, by encrypting the code, only the connection partner station can recognize it, and other stations cannot recognize it. Since it is impossible to have a common encryption key for encryption, a public key method is used.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A wireless router automatically finds and connects to a wireless router of a partner by wireless communication.
FIG. 4 is a part of the flowchart. 1. Connection procedure (1) Search for a connection partner A specific frequency common to all wireless routers is determined, and when the wireless router searches for a connection partner, transmission and reception are performed at this frequency. That is, it is the “ringing frequency”. First, the station A equipped with a wireless router performs reception at the calling frequency and confirms the presence or absence of radio wave input. If there is no input radio wave, the station A transmits a radio wave for searching for a connection partner. Station A transmits its own router number, transmittable frequency A, and public key for encryption. Then, an unspecified number of stations (stations B, C,...)
Receives this. Each of the received stations transmits the router number of the own station, a transmittable frequency, and a code necessary for spreading or despreading of spread spectrum communication at a calling frequency. The transmission information at this time is encrypted with the public key transmitted from the A station and transmitted.

Here, if the unspecified large number of received stations simultaneously transmit with respect to the transmission of the station A, interference may occur,
Station A cannot receive. In order to avoid this, each receiving station sets a waiting time arbitrarily, and transmits a response to the A station after the set time elapses after the transmission of the A station is completed.

(2) Transmission to the connection partner When the B station responds to the call of the A station, the A station decrypts the information from the B station encrypted with the public key using the secret key. Next, the station A sets communication conditions for the transmittable frequency A and the code B for spread spectrum communication transmitted from the station B. Then, the router number of the station A is transmitted to the station B to notify that the connection is ready. At this time, since the stations other than the stations A and B do not recognize the code B, they cannot intercept the contents of the communication and obtain information. Therefore, it is not necessary to encrypt information transmitted between the stations A and B mutually from this point.

Further, even if the other two stations X and Y are already connected at frequency A or frequency B, X
Since the stations and the Y station spread or despread with the code X or the code Y different from the code B, the communication between the stations A and B does not disturb the communication between the stations X and Y. . At the same time, X
The communication between the stations and the Y station does not disturb the communication between the A station and the B station.

(3) Completion of Connection The station B receives the transmission from the station A at the frequency A, performs despreading with the code B, and confirms the router number of the station A. Next, the station B transmits the router number of the station B at the frequency B and the code B to the station A to notify that the signal from the station A has been received. This is received by the station A, and the router number of the station B is confirmed. Thus, the connection is completed.

(4) Simultaneous connection with stations other than station B When many stations other than station B (stations C, D,...) Respond to the call from station A, , A
The connection shall be made at the same time as long as the capability of the receiving unit of the station radio allows. That is, as in the case of the station B, the code C is common to the station C, the station A transmits at the frequency A, and the station C transmits at the frequency C. Stations D,... Are similarly performed. The transmission of the station A is performed by the stations B, C, D
.. Are transmitted in time division. And
For reception at station A, a plurality of the same reception circuits are provided, and
., C, D,..., Receive despreading and demodulation separately to confirm connection.

2 Start of Routing (1) Creation of Routing Table When connection between stations A and B is completed, routing control information is transmitted to each other, and the routing table (routing control table) in the wireless router is updated. . Between stations A and C, and A
The same is done between the stations and the D station. Also, the wireless router automatically updates the routing table as needed with reference to the newly arrived routing control information.

(2) Start of Transmission of Internet Information The wireless router sends information of the received Internet information addressed to itself to the server computer, and appropriately retransmits information not addressed to itself based on the routing table.

[0017]

The present invention comprises a wireless router for performing spread spectrum communication on the Internet and a server computer, and the connection between the routers is performed by wireless communication. This eliminates the need for a dedicated line connection between routers and a line connection between the server computer and the user's terminal computer, so the leased line usage fee, contract fee and connection fee with the connection company, and line usage fee are permanent. You can enjoy the Internet for a long time without worrying about the line usage fee.

Further, as a wide area network,
Since it can be applied in various ways, it is possible to construct a telephone line network that does not require a telephone office.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of the present invention.

FIG. 2 is a configuration diagram of a spread spectrum communication device used in the present invention.

FIG. 3 is a spectrum distribution diagram in the spread spectrum communication of FIG. 2;

FIG. 4 is a part of a flowchart of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wireless router 2 ... Server computer 3 ... Information 4 ... Narrow band modulation 5 ... Spread modulation 6 ... Code 7 ... Despreading 8 ... Demodulation 9 ..Interference wave 10: Spread target wave 11 ... Target wave 12: Spread interference wave

Claims (1)

[Claims] 1. A packet communication type wide area network such as the Internet using spread spectrum communication, transmitting a code used for spreading and despreading of spread spectrum communication by public key encryption, and a router (packet switch). A wireless router and a connection method between the routers, wherein the connection is established by wireless communication.